/**
 * UR AI Assistant Public Styles
 *
 * Frontend styles.
 */

.ur-ai-box {
    max-width: 980px;
    margin: 32px auto;
    padding: 28px;
    border: 1px solid #e5e7eb;
    border-radius: 20px;
    background: #ffffff;
    box-shadow: 0 12px 32px rgba(15, 23, 42, 0.08);
    color: #1f2937;
    font-size: 16px;
    line-height: 1.7;
    box-sizing: border-box;
}

.ur-ai-box *,
.ur-ai-box *::before,
.ur-ai-box *::after {
    box-sizing: border-box;
}

.ur-ai-header {
    margin-bottom: 18px;
}

.ur-ai-header h2 {
    margin: 0 0 8px;
    font-size: 30px;
    line-height: 1.3;
    color: #111827;
    font-weight: 700;
}

.ur-ai-header p {
    margin: 0;
    color: #4b5563;
    font-size: 16px;
}

.ur-ai-notice {
    margin: 18px 0 22px;
    padding: 14px 16px;
    border-left: 4px solid #2563eb;
    border-radius: 12px;
    background: #eff6ff;
    color: #1e3a8a;
    font-size: 14px;
}

.ur-ai-section-heading {
    margin-bottom: 12px;
}

.ur-ai-section-heading h3 {
    margin: 0 0 4px;
    font-size: 19px;
    line-height: 1.4;
    color: #111827;
    font-weight: 700;
}

.ur-ai-section-heading p {
    margin: 0;
    color: #6b7280;
    font-size: 14px;
}

.ur-ai-popular-section,
.ur-ai-topics-section,
.ur-ai-examples,
.ur-ai-form,
.ur-ai-answer-wrap,
.ur-ai-followups,
.ur-ai-related-pages {
    margin-top: 22px;
}

.ur-ai-popular-list,
.ur-ai-topic-question-list,
.ur-ai-followup-list {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
}

.ur-ai-quick-question,
.ur-ai-followup-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 38px;
    padding: 8px 14px;
    border: 1px solid #dbeafe;
    border-radius: 999px;
    background: #f8fbff;
    color: #1d4ed8;
    font-size: 14px;
    line-height: 1.4;
    cursor: pointer;
    transition: all 0.18s ease;
}

.ur-ai-quick-question:hover,
.ur-ai-quick-question:focus,
.ur-ai-followup-btn:hover,
.ur-ai-followup-btn:focus {
    border-color: #2563eb;
    background: #2563eb;
    color: #ffffff;
    outline: none;
    transform: translateY(-1px);
}

.ur-ai-topics-heading {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
}

.ur-ai-toggle-topics {
    flex: 0 0 auto;
    padding: 8px 14px;
    border: 1px solid #d1d5db;
    border-radius: 999px;
    background: #ffffff;
    color: #374151;
    cursor: pointer;
    font-size: 14px;
    transition: all 0.18s ease;
}

.ur-ai-toggle-topics:hover,
.ur-ai-toggle-topics:focus {
    border-color: #2563eb;
    color: #2563eb;
    outline: none;
}

.ur-ai-topics-panel {
    margin-top: 14px;
    padding: 16px;
    border: 1px solid #eef2ff;
    border-radius: 16px;
    background: #f9fafb;
}

.ur-ai-topic-tabs {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: 14px;
}

.ur-ai-topic-tab {
    padding: 7px 12px;
    border: 1px solid #e5e7eb;
    border-radius: 999px;
    background: #ffffff;
    color: #4b5563;
    font-size: 14px;
    cursor: pointer;
    transition: all 0.18s ease;
}

.ur-ai-topic-tab:hover,
.ur-ai-topic-tab:focus {
    border-color: #2563eb;
    color: #2563eb;
    outline: none;
}

.ur-ai-topic-tab.is-active {
    border-color: #2563eb;
    background: #2563eb;
    color: #ffffff;
}

.ur-ai-topic-select-wrap {
    display: none;
    margin-bottom: 14px;
}

.ur-ai-topic-select-wrap label {
    display: block;
    margin-bottom: 6px;
    color: #374151;
    font-weight: 600;
    font-size: 14px;
}

.ur-ai-topic-select {
    width: 100%;
    padding: 10px 12px;
    border: 1px solid #d1d5db;
    border-radius: 12px;
    background: #ffffff;
    color: #111827;
}

.ur-ai-empty-text {
    margin: 0;
    color: #6b7280;
    font-size: 14px;
}

.ur-ai-examples {
    padding: 16px;
    border-radius: 16px;
    background: #f9fafb;
    border: 1px solid #f3f4f6;
}

.ur-ai-examples p {
    margin: 0 0 8px;
}

.ur-ai-examples ul {
    margin: 0;
    padding-left: 20px;
}

.ur-ai-examples li {
    margin: 4px 0;
    color: #4b5563;
}

.ur-ai-label {
    display: block;
    margin-bottom: 8px;
    color: #111827;
    font-weight: 700;
}

#ur-ai-question {
    width: 100%;
    min-height: 132px;
    padding: 14px 16px;
    border: 1px solid #d1d5db;
    border-radius: 16px;
    background: #ffffff;
    color: #111827;
    font-size: 16px;
    line-height: 1.7;
    resize: vertical;
    transition: border-color 0.18s ease, box-shadow 0.18s ease;
}

#ur-ai-question:focus {
    border-color: #2563eb;
    box-shadow: 0 0 0 4px rgba(37, 99, 235, 0.12);
    outline: none;
}

.ur-ai-form-footer {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    margin-top: 12px;
}

.ur-ai-counter {
    color: #6b7280;
    font-size: 14px;
}

.ur-ai-submit {
    min-width: 120px;
    padding: 10px 18px;
    border: 0;
    border-radius: 999px;
    background: #2563eb;
    color: #ffffff;
    font-weight: 700;
    cursor: pointer;
    transition: all 0.18s ease;
}

.ur-ai-submit:hover,
.ur-ai-submit:focus {
    background: #1d4ed8;
    outline: none;
    transform: translateY(-1px);
}

.ur-ai-submit:disabled {
    background: #93c5fd;
    cursor: not-allowed;
    transform: none;
}

.ur-ai-loading {
    margin-top: 18px;
    padding: 12px 14px;
    border-radius: 12px;
    background: #fef3c7;
    color: #92400e;
    font-size: 14px;
}

.ur-ai-error {
    margin-top: 18px;
    padding: 12px 14px;
    border-radius: 12px;
    background: #fef2f2;
    color: #991b1b;
    font-size: 14px;
}

.ur-ai-answer-wrap {
    padding: 22px;
    border: 1px solid #e5e7eb;
    border-radius: 18px;
    background: #ffffff;
    box-shadow: 0 8px 24px rgba(15, 23, 42, 0.06);
}

.ur-ai-answer-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    margin-bottom: 14px;
}

.ur-ai-answer-header h3 {
    margin: 0;
    color: #111827;
    font-size: 20px;
    line-height: 1.4;
}

.ur-ai-copy-answer {
    flex: 0 0 auto;
    padding: 7px 12px;
    border: 1px solid #d1d5db;
    border-radius: 999px;
    background: #ffffff;
    color: #374151;
    font-size: 13px;
    cursor: pointer;
    transition: all 0.18s ease;
}

.ur-ai-copy-answer:hover,
.ur-ai-copy-answer:focus {
    border-color: #2563eb;
    color: #2563eb;
    outline: none;
}

.ur-ai-copy-answer:disabled {
    opacity: 0.75;
    cursor: not-allowed;
}

.ur-ai-answer {
    color: #1f2937;
}

.ur-ai-answer p {
    margin: 0 0 12px;
}

.ur-ai-answer p:last-child {
    margin-bottom: 0;
}

.ur-ai-answer ul,
.ur-ai-answer ol {
    margin: 10px 0 12px;
    padding-left: 22px;
}

.ur-ai-answer li {
    margin: 4px 0;
}

.ur-ai-answer strong {
    color: #111827;
}

.ur-ai-answer-meta {
    margin-top: 14px;
    padding-top: 12px;
    border-top: 1px solid #f3f4f6;
    color: #6b7280;
    font-size: 13px;
}

.ur-ai-answer-disclaimer {
    margin-top: 14px;
    padding: 12px 14px;
    border-radius: 12px;
    background: #f9fafb;
    color: #6b7280;
    font-size: 13px;
}

.ur-ai-feedback {
    margin-top: 16px;
    padding-top: 16px;
    border-top: 1px solid #f3f4f6;
}

.ur-ai-feedback-title {
    margin: 0 0 10px;
    color: #374151;
    font-weight: 700;
}

.ur-ai-feedback-actions,
.ur-ai-feedback-reasons {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.ur-ai-feedback-reasons {
    margin-top: 12px;
}

.ur-ai-feedback-reasons p {
    flex-basis: 100%;
    margin: 0 0 2px;
    color: #6b7280;
    font-size: 14px;
}

.ur-ai-feedback-btn,
.ur-ai-feedback-reason {
    padding: 7px 12px;
    border: 1px solid #d1d5db;
    border-radius: 999px;
    background: #ffffff;
    color: #374151;
    font-size: 14px;
    cursor: pointer;
    transition: all 0.18s ease;
}

.ur-ai-feedback-btn:hover,
.ur-ai-feedback-btn:focus,
.ur-ai-feedback-reason:hover,
.ur-ai-feedback-reason:focus {
    border-color: #2563eb;
    color: #2563eb;
    outline: none;
}

.ur-ai-feedback-btn.is-selected,
.ur-ai-feedback-reason.is-selected {
    border-color: #2563eb;
    background: #eff6ff;
    color: #1d4ed8;
}

.ur-ai-feedback-btn:disabled,
.ur-ai-feedback-reason:disabled {
    opacity: 0.7;
    cursor: not-allowed;
}

.ur-ai-feedback-message {
    margin-top: 12px;
    color: #166534;
    font-size: 14px;
}

.ur-ai-followups,
.ur-ai-related-pages {
    padding: 18px;
    border-radius: 18px;
    background: #f9fafb;
    border: 1px solid #f3f4f6;
}

.ur-ai-followups h3,
.ur-ai-related-pages h3 {
    margin: 0 0 12px;
    color: #111827;
    font-size: 18px;
}

.ur-ai-related-list {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 12px;
}

.ur-ai-related-card {
    display: block;
    padding: 14px;
    border: 1px solid #e5e7eb;
    border-radius: 16px;
    background: #ffffff;
    color: inherit;
    text-decoration: none;
    transition: all 0.18s ease;
}

.ur-ai-related-card:hover,
.ur-ai-related-card:focus {
    border-color: #2563eb;
    box-shadow: 0 8px 20px rgba(37, 99, 235, 0.12);
    transform: translateY(-1px);
    outline: none;
}

.ur-ai-related-title {
    color: #1d4ed8;
    font-weight: 700;
    line-height: 1.5;
}

.ur-ai-related-description {
    margin-top: 6px;
    color: #4b5563;
    font-size: 14px;
    line-height: 1.6;
}

.ur-ai-related-category {
    margin-top: 8px;
    color: #6b7280;
    font-size: 12px;
}

@media (max-width: 782px) {
    .ur-ai-box {
        margin: 20px auto;
        padding: 20px;
        border-radius: 18px;
    }

    .ur-ai-header h2 {
        font-size: 24px;
    }

    .ur-ai-topics-heading {
        align-items: flex-start;
        flex-direction: column;
    }

    .ur-ai-toggle-topics {
        width: 100%;
    }

    .ur-ai-topic-tabs {
        display: none;
    }

    .ur-ai-topic-select-wrap {
        display: block;
    }

    .ur-ai-popular-list,
    .ur-ai-topic-question-list,
    .ur-ai-followup-list {
        display: grid;
        grid-template-columns: 1fr;
    }

    .ur-ai-quick-question,
    .ur-ai-followup-btn {
        width: 100%;
        justify-content: flex-start;
        text-align: left;
        border-radius: 14px;
    }

    .ur-ai-form-footer {
        align-items: stretch;
        flex-direction: column;
    }

    .ur-ai-submit {
        width: 100%;
    }

    .ur-ai-answer-header {
        align-items: flex-start;
        flex-direction: column;
    }

    .ur-ai-copy-answer {
        width: 100%;
    }

    .ur-ai-related-list {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 480px) {
    .ur-ai-box {
        padding: 16px;
        box-shadow: none;
        border-radius: 16px;
    }

    .ur-ai-header h2 {
        font-size: 22px;
    }

    .ur-ai-notice,
    .ur-ai-examples,
    .ur-ai-topics-panel,
    .ur-ai-answer-wrap,
    .ur-ai-followups,
    .ur-ai-related-pages {
        border-radius: 14px;
    }

    #ur-ai-question {
        min-height: 120px;
        border-radius: 14px;
    }
}

/* =========================================================
 * UR AI Assistant Frontend Beautify v1
 * 依目前 public.css 實際 class 結構追加美化
 * ========================================================= */

/* 讓整體區塊不要太滿版，形成集中閱讀感 */
.ur-ai-box {
    max-width: 1040px;
    margin: 48px auto 56px;
    padding: 0;
    border: 0;
    border-radius: 28px;
    background: transparent;
    box-shadow: none;
}

/* 上方 Hero 標題區 */
.ur-ai-box .ur-ai-header {
    margin: 0 0 22px;
    padding: 34px 38px 30px;
    border-radius: 28px;
    background: linear-gradient(135deg, #0f172a 0%, #1e3a5f 52%, #2563eb 100%);
    color: #ffffff;
    box-shadow: 0 20px 48px rgba(15, 23, 42, 0.2);
    position: relative;
    overflow: hidden;
}

.ur-ai-box .ur-ai-header::after {
    content: "";
    position: absolute;
    right: -72px;
    top: -72px;
    width: 230px;
    height: 230px;
    border-radius: 999px;
    background: rgba(255, 255, 255, 0.13);
    pointer-events: none;
}

.ur-ai-box .ur-ai-header h2 {
    margin: 0 0 12px;
    font-size: 34px;
    line-height: 1.25;
    color: #ffffff;
    font-weight: 800;
    letter-spacing: 0.02em;
}

.ur-ai-box .ur-ai-header p {
    max-width: 820px;
    margin: 0;
    color: rgba(255, 255, 255, 0.9);
    font-size: 16px;
    line-height: 1.85;
}

/* 使用提醒改成 Hero 內的柔和提示感 */
.ur-ai-box .ur-ai-notice {
    margin: 0 0 22px;
    padding: 18px 20px;
    border-left: 0;
    border-radius: 20px;
    background: #ffffff;
    border: 1px solid #e5e7eb;
    color: #475569;
    font-size: 14px;
    line-height: 1.8;
    box-shadow: 0 12px 32px rgba(15, 23, 42, 0.07);
}

/* 主要內容區塊統一卡片化 */
.ur-ai-popular-section,
.ur-ai-topics-section,
.ur-ai-examples,
.ur-ai-form,
.ur-ai-answer-wrap,
.ur-ai-followups,
.ur-ai-related-pages {
    margin-top: 22px;
    padding: 24px;
    border-radius: 24px;
    background: #ffffff;
    border: 1px solid #e5e7eb;
    box-shadow: 0 12px 34px rgba(15, 23, 42, 0.07);
}

/* 區塊標題 */
.ur-ai-section-heading h3,
.ur-ai-followups h3,
.ur-ai-related-pages h3 {
    margin-bottom: 8px;
    font-size: 20px;
    font-weight: 800;
    color: #0f172a;
}

.ur-ai-section-heading p {
    color: #64748b;
    line-height: 1.7;
}

/* 熱門問題與延伸提問按鈕 */
.ur-ai-quick-question,
.ur-ai-followup-btn {
    min-height: 40px;
    padding: 9px 16px;
    border: 1px solid #dbeafe;
    border-radius: 999px;
    background: #f8fbff;
    color: #1d4ed8;
    font-size: 14px;
    font-weight: 700;
    box-shadow: 0 4px 10px rgba(15, 23, 42, 0.04);
}

.ur-ai-quick-question:hover,
.ur-ai-quick-question:focus,
.ur-ai-followup-btn:hover,
.ur-ai-followup-btn:focus {
    border-color: #2563eb;
    background: #2563eb;
    color: #ffffff;
    box-shadow: 0 10px 22px rgba(37, 99, 235, 0.22);
}

/* 主題分類區塊 */
.ur-ai-topics-panel {
    margin-top: 16px;
    padding: 20px;
    border-radius: 20px;
    background: #f8fafc;
    border: 1px solid #e5e7eb;
}

.ur-ai-topic-tab {
    padding: 8px 14px;
    font-weight: 700;
}

.ur-ai-topic-tab.is-active {
    border-color: #2563eb;
    background: #2563eb;
    color: #ffffff;
}

/* 範例區塊稍微淡化，避免搶主表單 */
.ur-ai-examples {
    background: #f8fafc;
    box-shadow: none;
}

.ur-ai-examples p {
    color: #0f172a;
    font-weight: 700;
}

.ur-ai-examples li {
    color: #475569;
}

/* 表單卡片強化 */
.ur-ai-form {
    background: #ffffff;
}

.ur-ai-label {
    margin-bottom: 10px;
    font-size: 16px;
    color: #0f172a;
}

/* 輸入框 */
#ur-ai-question {
    min-height: 150px;
    padding: 18px 20px;
    border-radius: 20px;
    border: 1px solid #d6deea;
    font-size: 16px;
    line-height: 1.8;
    color: #0f172a;
    background: #ffffff;
    box-shadow: inset 0 1px 2px rgba(15, 23, 42, 0.03);
}

#ur-ai-question:focus {
    border-color: #2563eb;
    box-shadow: 0 0 0 4px rgba(37, 99, 235, 0.12);
}

/* 表單底部 */
.ur-ai-form-footer {
    margin-top: 16px;
}

.ur-ai-counter {
    color: #64748b;
    font-size: 14px;
}

/* 送出按鈕 */
.ur-ai-submit {
    min-width: 132px;
    padding: 12px 24px;
    border-radius: 999px;
    background: linear-gradient(135deg, #2563eb 0%, #1d4ed8 100%);
    color: #ffffff;
    font-size: 15px;
    font-weight: 800;
    box-shadow: 0 10px 22px rgba(37, 99, 235, 0.24);
}

.ur-ai-submit:hover,
.ur-ai-submit:focus {
    background: linear-gradient(135deg, #1d4ed8 0%, #1e40af 100%);
    box-shadow: 0 14px 28px rgba(37, 99, 235, 0.3);
}

/* 如果前台有清除問題按鈕，套用同樣風格 */
.ur-ai-clear,
#ur-ai-clear {
    min-width: 118px;
    padding: 12px 22px;
    border: 1px solid #d6deea;
    border-radius: 999px;
    background: #ffffff;
    color: #475569;
    font-size: 15px;
    font-weight: 700;
    cursor: pointer;
    transition: all 0.18s ease;
}

.ur-ai-clear:hover,
#ur-ai-clear:hover {
    background: #f1f5f9;
    border-color: #cbd5e1;
}

/* Loading 狀態改成柔和提示 */
.ur-ai-loading {
    margin-top: 18px;
    padding: 15px 18px;
    border-radius: 18px;
    background: #fff7d6;
    border: 1px solid #fde68a;
    color: #92400e;
    font-size: 15px;
    line-height: 1.7;
}

/* 錯誤提示 */
.ur-ai-error {
    margin-top: 18px;
    padding: 15px 18px;
    border-radius: 18px;
    background: #fff1f2;
    border: 1px solid #fecdd3;
    color: #be123c;
}

/* 回答區 */
.ur-ai-answer-wrap {
    background: #ffffff;
    border-radius: 24px;
    border: 1px solid #e5e7eb;
    box-shadow: 0 16px 42px rgba(15, 23, 42, 0.08);
}

.ur-ai-answer-header h3 {
    font-size: 22px;
    font-weight: 800;
    color: #0f172a;
}

.ur-ai-answer {
    color: #1f2937;
    font-size: 16px;
    line-height: 1.9;
}

/* 複製回答按鈕 */
.ur-ai-copy-answer {
    padding: 8px 14px;
    border-radius: 999px;
    font-weight: 700;
}

/* 免責提醒 */
.ur-ai-answer-disclaimer {
    margin-top: 16px;
    padding: 14px 16px;
    border-radius: 16px;
    background: #f8fafc;
    color: #64748b;
    line-height: 1.7;
}

/* 回饋區 */
.ur-ai-feedback {
    margin-top: 18px;
    padding-top: 18px;
}

.ur-ai-feedback-title {
    color: #334155;
}

.ur-ai-feedback-btn,
.ur-ai-feedback-reason {
    font-weight: 700;
}

.ur-ai-feedback-btn.is-selected,
.ur-ai-feedback-reason.is-selected {
    border-color: #2563eb;
    background: #eff6ff;
    color: #1d4ed8;
}

/* 相關文章推薦 */
.ur-ai-related-list {
    gap: 14px;
}

.ur-ai-related-card {
    padding: 18px;
    border-radius: 20px;
    background: #ffffff;
    box-shadow: 0 6px 18px rgba(15, 23, 42, 0.05);
}

.ur-ai-related-card:hover,
.ur-ai-related-card:focus {
    border-color: #2563eb;
    box-shadow: 0 12px 26px rgba(37, 99, 235, 0.14);
}

.ur-ai-related-title {
    color: #1d4ed8;
    font-weight: 800;
}

.ur-ai-related-description {
    color: #475569;
}

/* 平板與手機 */
@media (max-width: 782px) {
    .ur-ai-box {
        margin: 28px 14px 44px;
    }

    .ur-ai-box .ur-ai-header {
        padding: 28px 22px 24px;
        border-radius: 24px;
    }

    .ur-ai-box .ur-ai-header h2 {
        font-size: 28px;
    }

    .ur-ai-box .ur-ai-header p {
        font-size: 15px;
    }

    .ur-ai-popular-section,
    .ur-ai-topics-section,
    .ur-ai-examples,
    .ur-ai-form,
    .ur-ai-answer-wrap,
    .ur-ai-followups,
    .ur-ai-related-pages {
        padding: 20px;
        border-radius: 22px;
    }

    .ur-ai-form-footer {
        align-items: stretch;
        flex-direction: column;
    }

    .ur-ai-submit,
    .ur-ai-clear,
    #ur-ai-clear {
        width: 100%;
    }
}

/* 小手機 */
@media (max-width: 480px) {
    .ur-ai-box {
        margin: 20px 10px 36px;
    }

    .ur-ai-box .ur-ai-header {
        padding: 24px 18px 22px;
    }

    .ur-ai-box .ur-ai-header h2 {
        font-size: 24px;
    }

    .ur-ai-popular-section,
    .ur-ai-topics-section,
    .ur-ai-examples,
    .ur-ai-form,
    .ur-ai-answer-wrap,
    .ur-ai-followups,
    .ur-ai-related-pages {
        padding: 16px;
        border-radius: 18px;
    }

    #ur-ai-question {
        min-height: 128px;
        border-radius: 16px;
    }

    .ur-ai-quick-question,
    .ur-ai-followup-btn {
        border-radius: 14px;
    }
}

/* =========================================================
 * UR AI Assistant Frontend Beautify v2
 * 對應 assistant-view.php 新版結構：
 * .ur-ai-assistant / .ur-ai-container / .ur-ai-section
 * 建議追加在 public.css 最底部，優先覆蓋舊版 .ur-ai-box 樣式。
 * ========================================================= */

.ur-ai-assistant,
.ur-ai-assistant *,
.ur-ai-assistant *::before,
.ur-ai-assistant *::after {
    box-sizing: border-box;
}

.ur-ai-assistant {
    --ur-ai-primary: #2563eb;
    --ur-ai-primary-dark: #1d4ed8;
    --ur-ai-ink: #0f172a;
    --ur-ai-text: #334155;
    --ur-ai-muted: #64748b;
    --ur-ai-line: #e2e8f0;
    --ur-ai-soft: #f8fafc;
    --ur-ai-soft-blue: #eff6ff;
    --ur-ai-warn: #fff7d6;

    width: 100%;
    max-width: 1120px;
    margin: 46px auto 64px;
    padding: 0 18px;
    color: var(--ur-ai-text);
    font-size: 16px;
    line-height: 1.8;
}

.ur-ai-container {
    border-radius: 30px;
    background:
        radial-gradient(circle at top right, rgba(37, 99, 235, 0.11), transparent 34%),
        linear-gradient(180deg, #ffffff 0%, #f8fafc 100%);
    border: 1px solid rgba(226, 232, 240, 0.9);
    box-shadow: 0 24px 70px rgba(15, 23, 42, 0.10);
    overflow: hidden;
}

.ur-ai-header {
    position: relative;
    margin: 0;
    padding: 42px 44px 34px;
    color: #ffffff;
    background:
        radial-gradient(circle at 88% 12%, rgba(255, 255, 255, 0.22), transparent 20%),
        linear-gradient(135deg, #0f172a 0%, #1e3a5f 48%, #2563eb 100%);
    overflow: hidden;
}

.ur-ai-header::before {
    content: "";
    position: absolute;
    right: -92px;
    bottom: -112px;
    width: 280px;
    height: 280px;
    border-radius: 999px;
    background: rgba(255, 255, 255, 0.10);
    pointer-events: none;
}

.ur-ai-title {
    position: relative;
    z-index: 1;
    margin: 0 0 12px;
    color: #ffffff;
    font-size: clamp(28px, 3vw, 40px);
    line-height: 1.22;
    font-weight: 850;
    letter-spacing: 0.02em;
}

.ur-ai-subtitle {
    position: relative;
    z-index: 1;
    max-width: 850px;
    margin: 0;
    color: rgba(255, 255, 255, 0.92);
    font-size: 16px;
    line-height: 1.9;
}

.ur-ai-disclaimer {
    position: relative;
    z-index: 1;
    max-width: 920px;
    margin-top: 22px;
    padding: 14px 18px;
    border: 1px solid rgba(255, 255, 255, 0.22);
    border-radius: 18px;
    background: rgba(255, 255, 255, 0.12);
    color: rgba(255, 255, 255, 0.92);
    backdrop-filter: blur(8px);
}

.ur-ai-disclaimer p {
    margin: 0;
}

.ur-ai-body {
    padding: 26px;
}

/* 統一卡片 */
.ur-ai-section,
.ur-ai-answer-wrap,
.ur-ai-followups,
.ur-ai-related-pages {
    margin-top: 22px;
    padding: 24px;
    border-radius: 24px;
    background: rgba(255, 255, 255, 0.96);
    border: 1px solid var(--ur-ai-line);
    box-shadow: 0 12px 36px rgba(15, 23, 42, 0.07);
}

.ur-ai-body > .ur-ai-section:first-child {
    margin-top: 0;
}

.ur-ai-popular-header,
.ur-ai-section-title,
.ur-ai-popular-title,
.ur-ai-result h3,
.ur-ai-followups h3,
.ur-ai-related-pages h3 {
    margin-top: 0;
    color: var(--ur-ai-ink);
    font-weight: 850;
    letter-spacing: 0.01em;
}

.ur-ai-popular-title,
.ur-ai-section-title {
    margin-bottom: 14px;
    font-size: 20px;
    line-height: 1.45;
}

/* 熱門問題 */
.ur-ai-popular-list {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin: 0;
    padding: 0;
    list-style: none;
}

.ur-ai-popular-item {
    margin: 0;
    padding: 0;
}

.ur-ai-popular-button,
.ur-ai-quick-question,
.ur-ai-followup-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 42px;
    padding: 9px 16px;
    border: 1px solid #bfdbfe;
    border-radius: 999px;
    background: #ffffff;
    color: var(--ur-ai-primary-dark);
    font-size: 14px;
    font-weight: 750;
    line-height: 1.45;
    cursor: pointer;
    box-shadow: 0 5px 14px rgba(15, 23, 42, 0.05);
    transition: transform 0.18s ease, box-shadow 0.18s ease, border-color 0.18s ease, background 0.18s ease, color 0.18s ease;
}

.ur-ai-popular-button:hover,
.ur-ai-popular-button:focus,
.ur-ai-quick-question:hover,
.ur-ai-quick-question:focus,
.ur-ai-followup-btn:hover,
.ur-ai-followup-btn:focus {
    border-color: var(--ur-ai-primary);
    background: var(--ur-ai-primary);
    color: #ffffff;
    outline: none;
    transform: translateY(-1px);
    box-shadow: 0 12px 26px rgba(37, 99, 235, 0.22);
}

/* 主題快速提問 */
.ur-ai-popular-groups {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 16px;
}

.ur-ai-popular-group {
    padding: 18px;
    border-radius: 20px;
    background: var(--ur-ai-soft);
    border: 1px solid #edf2f7;
}

.ur-ai-popular-group-title {
    margin: 0 0 12px;
    color: var(--ur-ai-ink);
    font-size: 16px;
    font-weight: 850;
}

/* 表單 */
.ur-ai-form {
    margin: 0;
}

.ur-ai-input-wrap {
    position: relative;
}

.ur-ai-question-input,
#ur-ai-question {
    width: 100%;
    min-height: 150px;
    padding: 18px 20px;
    border: 1px solid #cbd5e1;
    border-radius: 22px;
    background: #ffffff;
    color: var(--ur-ai-ink);
    font-size: 16px;
    line-height: 1.85;
    resize: vertical;
    box-shadow: inset 0 1px 2px rgba(15, 23, 42, 0.035);
    transition: border-color 0.18s ease, box-shadow 0.18s ease;
}

.ur-ai-question-input:focus,
#ur-ai-question:focus {
    border-color: var(--ur-ai-primary);
    box-shadow: 0 0 0 4px rgba(37, 99, 235, 0.13);
    outline: none;
}

.ur-ai-form-footer {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 14px;
    margin-top: 16px;
}

.ur-ai-counter {
    color: var(--ur-ai-muted);
    font-size: 14px;
}

.ur-ai-actions {
    display: flex;
    align-items: center;
    justify-content: flex-end;
    gap: 10px;
}

.ur-ai-clear,
#ur-ai-clear {
    min-width: 118px;
    padding: 12px 22px;
    border: 1px solid #cbd5e1;
    border-radius: 999px;
    background: #ffffff;
    color: #475569;
    font-size: 15px;
    font-weight: 750;
    cursor: pointer;
    transition: all 0.18s ease;
}

.ur-ai-clear:hover,
.ur-ai-clear:focus,
#ur-ai-clear:hover,
#ur-ai-clear:focus {
    border-color: #94a3b8;
    background: #f1f5f9;
    outline: none;
}

.ur-ai-submit {
    min-width: 132px;
    padding: 12px 24px;
    border: 0;
    border-radius: 999px;
    background: linear-gradient(135deg, var(--ur-ai-primary) 0%, var(--ur-ai-primary-dark) 100%);
    color: #ffffff;
    font-size: 15px;
    font-weight: 850;
    cursor: pointer;
    box-shadow: 0 12px 26px rgba(37, 99, 235, 0.25);
    transition: transform 0.18s ease, box-shadow 0.18s ease, background 0.18s ease;
}

.ur-ai-submit:hover,
.ur-ai-submit:focus {
    background: linear-gradient(135deg, #1d4ed8 0%, #1e40af 100%);
    box-shadow: 0 16px 32px rgba(37, 99, 235, 0.32);
    outline: none;
    transform: translateY(-1px);
}

.ur-ai-submit:disabled {
    background: #93c5fd;
    box-shadow: none;
    cursor: not-allowed;
    transform: none;
}

/* Loading */
.ur-ai-loading {
    display: none;
    align-items: center;
    gap: 10px;
    margin-top: 18px;
    padding: 15px 18px;
    border-radius: 18px;
    background: var(--ur-ai-warn);
    border: 1px solid #fde68a;
    color: #92400e;
    font-size: 15px;
    line-height: 1.7;
}

.ur-ai-loading.is-active,
.ur-ai-loading[style*="block"],
.ur-ai-loading[style*="inline"] {
    display: flex;
}

.ur-ai-spinner {
    width: 18px;
    height: 18px;
    border: 2px solid rgba(146, 64, 14, 0.26);
    border-top-color: #92400e;
    border-radius: 999px;
    animation: urAiSpin 0.8s linear infinite;
}

@keyframes urAiSpin {
    to {
        transform: rotate(360deg);
    }
}

/* 回答結果區：兼容 JS 直接輸出到 .ur-ai-result */
.ur-ai-result {
    margin-top: 20px;
}

.ur-ai-result:empty {
    display: none;
}

.ur-ai-result,
.ur-ai-answer,
.ur-ai-answer-wrap {
    color: #1f2937;
    font-size: 16px;
    line-height: 1.95;
}

.ur-ai-result p,
.ur-ai-answer p {
    margin: 0 0 13px;
}

.ur-ai-result ul,
.ur-ai-result ol,
.ur-ai-answer ul,
.ur-ai-answer ol {
    margin: 10px 0 14px;
    padding-left: 24px;
}

.ur-ai-result li,
.ur-ai-answer li {
    margin: 5px 0;
}

.ur-ai-result h3,
.ur-ai-answer-header h3 {
    font-size: 22px;
    font-weight: 850;
    color: var(--ur-ai-ink);
}

/* 回饋、延伸提問、相關文章 */
.ur-ai-feedback,
.ur-ai-answer-disclaimer {
    margin-top: 16px;
    padding: 14px 16px;
    border-radius: 16px;
    background: var(--ur-ai-soft);
    color: var(--ur-ai-muted);
}

.ur-ai-feedback-actions,
.ur-ai-feedback-reasons,
.ur-ai-followup-list {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.ur-ai-feedback-btn,
.ur-ai-feedback-reason {
    padding: 8px 13px;
    border: 1px solid #cbd5e1;
    border-radius: 999px;
    background: #ffffff;
    color: #334155;
    font-size: 14px;
    font-weight: 750;
    cursor: pointer;
}

.ur-ai-feedback-btn.is-selected,
.ur-ai-feedback-reason.is-selected {
    border-color: var(--ur-ai-primary);
    background: var(--ur-ai-soft-blue);
    color: var(--ur-ai-primary-dark);
}

.ur-ai-related-list {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 14px;
}

.ur-ai-related-card {
    display: block;
    padding: 18px;
    border: 1px solid var(--ur-ai-line);
    border-radius: 20px;
    background: #ffffff;
    color: inherit;
    text-decoration: none;
    box-shadow: 0 6px 18px rgba(15, 23, 42, 0.05);
    transition: all 0.18s ease;
}

.ur-ai-related-card:hover,
.ur-ai-related-card:focus {
    border-color: var(--ur-ai-primary);
    box-shadow: 0 14px 30px rgba(37, 99, 235, 0.14);
    transform: translateY(-1px);
    outline: none;
}

.ur-ai-related-title {
    color: var(--ur-ai-primary-dark);
    font-weight: 850;
    line-height: 1.5;
}

.ur-ai-related-description {
    margin-top: 7px;
    color: #475569;
    font-size: 14px;
    line-height: 1.65;
}

/* 行動裝置 */
@media (max-width: 782px) {
    .ur-ai-assistant {
        margin: 28px auto 44px;
        padding: 0 12px;
    }

    .ur-ai-container {
        border-radius: 24px;
    }

    .ur-ai-header {
        padding: 30px 22px 26px;
    }

    .ur-ai-body {
        padding: 18px;
    }

    .ur-ai-section,
    .ur-ai-answer-wrap,
    .ur-ai-followups,
    .ur-ai-related-pages {
        padding: 20px;
        border-radius: 22px;
    }

    .ur-ai-popular-groups,
    .ur-ai-related-list {
        grid-template-columns: 1fr;
    }

    .ur-ai-popular-list,
    .ur-ai-followup-list {
        display: grid;
        grid-template-columns: 1fr;
    }

    .ur-ai-popular-button,
    .ur-ai-quick-question,
    .ur-ai-followup-btn {
        width: 100%;
        justify-content: flex-start;
        text-align: left;
        border-radius: 16px;
    }

    .ur-ai-form-footer {
        align-items: stretch;
        flex-direction: column;
    }

    .ur-ai-actions {
        width: 100%;
        flex-direction: column;
    }

    .ur-ai-submit,
    .ur-ai-clear,
    #ur-ai-clear {
        width: 100%;
    }
}

@media (max-width: 480px) {
    .ur-ai-assistant {
        margin: 18px auto 34px;
        padding: 0 10px;
    }

    .ur-ai-header {
        padding: 26px 18px 22px;
    }

    .ur-ai-title {
        font-size: 25px;
    }

    .ur-ai-subtitle,
    .ur-ai-disclaimer {
        font-size: 14px;
    }

    .ur-ai-body {
        padding: 14px;
    }

    .ur-ai-section,
    .ur-ai-answer-wrap,
    .ur-ai-followups,
    .ur-ai-related-pages {
        margin-top: 16px;
        padding: 17px;
        border-radius: 18px;
    }

    .ur-ai-question-input,
    #ur-ai-question {
        min-height: 128px;
        border-radius: 18px;
    }
}